Improvement in steam-hammers



W. WALKER.

STEAM HAMMER,

$1 ,182,725, Patented Sept. 26,1876.

I I IIII -IIII fl lllulllili vmuississ ATI DRNEYS1 UNITED STATES PATENTOFFICE.

WILLIAM WALKER, OF MANCHESTER, ENGLAND, ASSIGNOR TO HIMSELF AND JOHN S.OROSSLEY, OF WILMINGTON, DELAWARE.

IMPROVEMENT IN STEAM-HAMMERS.

Specification forming part of Letters Patent No. 182,725, datedSeptember 26, 1876; application filed August 11, 1876.

To all whom it may concern:

Be it known that 1, WILLIAM WALKER, of Manchester, Lancaster county,England, have invented a new and useful Improvement in Steam-Hammers;and I do hereby declare the following to be a full, clear, and exactdescription of the same, reference being had to the drawingsaccompanying and forming part of this specification, in which- Figure 1represents a side elevation of my invention. Fig. 2 is a detail view ofcertain parts of the same.

The object of my invention is the construction of an improved automaticmechanism, whereby a dead blow may be struck by a steam-hammer at anypoint of its descent, and the lower steam-port opened immediately after;and it consists of certain levers, links, and connecting-rods,constructed. and arranged in a manner hereinafter more fully described.

In the accompanying drawings, A represents a dropping-lever, whichpivots at one end, a, on the tup of the steam-hammer J, the other endbeing connected by the link B withthe end of the short arm 0 of therectangularly-bent lever O. A projection, a, on the tup of the hammerstops the lever A when it has fallen nearly far enough to be in astraight line with the link B, and makes it again assume an angle withthe latter when the hammer rises. D is a connecting-rod, one end ofwhich, d, is also pivoted to the tup of the hammer, the other beingattached to the lever O at the right angle d formed by the short arm 0and long arm 0 of the latter. Said lever 0 is swung from the fixed pointe by the rod- E, the lower end of which pivots at d. The lever (l isconnected with the valve-spindle H by means of the link F and lever G,the former pivoting at f. I is a spring attached to the long arm 0 ofthe lever G, to render the motion of the mechanism quick, easy, andsmooth in action. K is the valvecylinder, and L L are the upper andlower valves; 6 l the upper and lower steam-ports, and m m the upperand. lower exhaust-ports, respectively.

The mode of operation of the invention is as follows: A blow having beenstruck and the lower steam-port Z opened, the hammer, in rising, bymeans of the rod D pulls the lever 0 toward itself, said lever swingingon the fixed point e. The projection a in the mean time graduallyvdecreases the angle between the lever A and link B, and rotates towardthe hammer, the short arm of the lever O causing said lever to depress,by means of link F and lever G, the valve-spindle H, and, consequently,reverse the valves. The hammer now falling, the rapidity of its descentmakes the lever A keep its angle with the link B until the blow isstruck, when said lever immediately drops nearly into a straight linewith said link, pushes the lever C out from the hammer, and,consequently, by means of link F and lever G, raises the valve-spindle,and again reverses the valves.

It is apparent that this action will take place should the hammer stopat any part of its fall, but never till it stops, which is a usefulfeature in working different thicknesses of metal. The long arm 0 of thelever 0 serves to work the hammer by hand, when desirable.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

The combination, with a steam-hammer, of the dropping-lever A,projection a on the tup of the hammer, link B, connecting-rod D, lever 0swung from a fixed point,e, by connecting-rod E, link F, and lever G,connected with the valve-spindle H, all constructed and arrangedsubstantially as shown and described, for the purpose specified.

WILLIAM WALKER.

Witnesses GEORGE S. HAGANY, J. E. HAGANY.

